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Pronunciation |
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(FAK
ter nyne, PURE eh fide HYU
man) |
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U.S. Brand
Names |
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Mononine® |
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Generic
Available |
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No |
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Pharmacological Index |
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Antihemophilic Agent; Blood Product Derivative |
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Use |
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Control bleeding in patients with factor IX deficiency (hemophilia B or
Christmas disease)
Mononine® contains nondetectable levels of factors
II, VII, and X (<0.0025 units per factor IX unit using standard
coagulation assays) and is, therefore, NOT INDICATED for replacement
therapy of any of these clotting factors
Mononine® is also NOT INDICATED in the
treatment or reversal of coumarin-induced anticoagulation or in a hemorrhagic
state caused by hepatitis-induced lack of production of liver dependent
coagulation factors. |
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Pregnancy Risk
Factor |
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C |
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Contraindications |
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Known hypersensitivity to mouse protein |
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Warnings/Precautions |
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Use with caution in patients with liver dysfunction; prepared from pooled
human plasma - the risk of viral transmission is not totally eradicated; monitor
patients who receive repeated doses twice daily with PTT and level of factor
being replaced (eg, IX). Observe closely for signs or symptoms of intravascular
coagulation or thrombosis. Caution should be exercised when administering to
patients with liver disease, postoperatively, neonates, or patients at risk of
thromboembolic phenomena or disseminated intravascular coagulation because of
the potential risk of thromboembolic complications. |
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Adverse
Reactions |
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1% to 10%:
Central nervous system: Fever, headache, chills
Neuromuscular & skeletal: Tingling
Miscellaneous: Following rapid administration: Transient fever
<1%: Flushing, DIC, thrombosis following high dosages because of presence
of activated clotting factors, tightness in chest, somnolence, urticaria,
nausea, vomiting, tightness in neck |
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Overdosage/Toxicology |
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Symptoms of overdose include disseminated intravascular coagulation
(DIC) |
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Drug
Interactions |
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Increased toxicity: Do not coadminister with aminocaproic acid may
increase the risk for thrombosis |
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Stability |
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When stored at refrigerator temperature, 2°C to
8°C (36°F to
46°F), coagulation factor IX is stable for the period
indicated by the expiration date on its label. Avoid freezing which may damage
container for the diluent.
Standard diluent: Dose in units/bag
Minimum volume: Use complete vial(s) for entire dose
Comments: Infusion rate should be up to 225 units/minute (2 mL/minute)
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Mechanism of
Action |
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Replaces deficient clotting factor IX; concentrate of factor IX; hemophilia
B, or Christmas disease, is an X-linked inherited disorder of blood coagulation
characterized by insufficient or abnormal synthesis of the clotting protein
factor IX. Factor IX is a vitamin K-dependent coagulation factor which is
synthesized in the liver. Factor IX is activated by factor XIa in the intrinsic
coagulation pathway. Activated factor IX (IXa), in combination with factor VII:C
activates factor X to Xa, resulting ultimately in the conversion of prothrombin
to thrombin and the formation of a fibrin clot. The infusion of exogenous factor
IX to replace the deficiency present in hemophilia B temporarily restores
hemostasis. Depending upon the patient's level of biologically active factor IX,
clinical symptoms range from moderate skin bruising or excessive hemorrhage
after trauma or surgery to spontaneous hemorrhage into joints, muscles, or
internal organs including the brain. Severe or recurring hemorrhages can produce
death, organ dysfunction, or orthopedic deformity. |
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Pharmacodynamics/Kinetics |
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Half-life for IX component: 23-31 hours |
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Usual Dosage |
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Children and Adults: Dosage is expressed in units of factor IX activity and
must be individualized. I.V. only:
Number of Factor IX Units Required = body weight (in kg) x desired Factor IX
level increase (% normal) x 1 unit/kg
For example, for a 100% level a patient who has an actual level of 20%:
Number of Factor IX Units needed = 70 kg x 80% x 1 Unit/kg = 5,600 Units
As a general rule, the level of factor IX required for treatment of different
conditions is listed below:
Minor Spontaneous Hemorrhage, Prophylaxis:
Desired levels of factor IX for hemostasis: 15% to 25%
Initial loading dose to achieve desired level: <20-30 units/kg
Frequency of dosing: Once; repeated in 24 hours if necessary
Duration of treatment: Once; repeated if necessary
Major Trauma or Surgery:
Desired levels of factor IX for hemostasis: 25% to 50%
Initial loading dose to achieve desired level: <75 units/kg
Frequency of dosing: q18-30h, depending on half-life and measured factor IX
levels
Duration of treatment: Up to 10 days, depending upon nature of insult
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Administration |
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Solution should be infused at room temperature
I.V. administration only:
Should be infused slowly: The rate of administration should be
determined by the response and comfort of the patient; intravenous dosage
administration rates of up to 225 units/minute (~2 mL/minute) have been
regularly tolerated without incident.
Infuse at a rate not exceeding 2 mL/minute |
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Monitoring
Parameters |
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Levels of factors being replaced (eg, IX), PTT |
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Reference Range |
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Average normal factor IX levels are 50% to 150%; patients with severe
hemophilia will have levels <1%, often undetectable. Moderate forms of the
disease have levels of 1% to 10% while some mild cases may have 11% to 49% of
normal factor IX.
In preparation for and following surgery:
Level to prevent spontaneous hemorrhage: 5%
Minimum level for hemostasis following trauma and surgery: 30% to 50%
Severe hemorrhage: >60%
Major surgery: greater than or equal to 50% prior to procedure, 30% to 50%
for several days after surgery, and >20% for 10-14 days thereafter
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Patient
Information |
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Early signs of hypersensitivity reactions including hives, generalized
urticaria, tightness of the chest, wheezing, hypotension, and anaphylaxis
indicate discontinuation of use of the concentrate and physician should be
contacted if these symptoms occur |
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Dosage Forms |
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Factor IX units listed per vial and per lot to lot variation of factor IX
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